diff --git a/Lib/http/cookiejar.py b/Lib/http/cookiejar.py
index 0ba8200f32..2fade875b9 100644
--- a/Lib/http/cookiejar.py
+++ b/Lib/http/cookiejar.py
@@ -30,6 +30,7 @@ __all__ = ['Cookie', 'CookieJar', 'CookiePolicy', 'DefaultCookiePolicy',
 
 import copy
 import datetime
+import os
 import re
 import time
 import urllib.parse, urllib.request
@@ -1763,9 +1764,9 @@ class FileCookieJar(CookieJar):
         CookieJar.__init__(self, policy)
         if filename is not None:
             try:
-                filename+""
+                filename = os.fspath(filename)
             except:
-                raise ValueError("filename must be string-like")
+                raise ValueError("filename must be string-like or PathLike")
         self.filename = filename
         self.delayload = bool(delayload)